/*
 * Copyright (c) 2017 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.yangtools.yang.data.codec.gson;

import static org.junit.Assert.assertEquals;

import com.google.gson.JsonParser;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.nio.charset.StandardCharsets;
import org.junit.Test;
import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.common.XMLNamespace;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
import org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableContainerNodeBuilder;
import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
import org.opendaylight.yangtools.yang.model.api.SchemaPath;
import org.opendaylight.yangtools.yang.test.util.YangParserTestUtils;

public class Bug7246Test {
    private static final String NS = "my-namespace";

    @Test
    public void test() throws Exception {
        final EffectiveModelContext schemaContext =
                YangParserTestUtils.parseYangResource("/bug7246/yang/rpc-test.yang");
        final ContainerNode inputStructure = ImmutableContainerNodeBuilder.create()
                .withNodeIdentifier(new NodeIdentifier(qN("my-name")))
                .withChild(ImmutableNodes.leafNode(new NodeIdentifier(qN("my-name")), "my-value")).build();
        final SchemaPath rootPath = SchemaPath.create(true, qN("my-name"), qN("input"));
        final Writer writer = new StringWriter();
        final String jsonOutput = normalizedNodeToJsonStreamTransformation(schemaContext, rootPath, writer,
                inputStructure);

        assertEquals(JsonParser.parseReader(new FileReader(
            new File(getClass().getResource("/bug7246/json/expected-output.json").toURI()), StandardCharsets.UTF_8)),
            JsonParser.parseString(jsonOutput));
    }

    private static QName qN(final String localName) {
        return QName.create(NS, localName);
    }

    private static String normalizedNodeToJsonStreamTransformation(final EffectiveModelContext schemaContext,
            final SchemaPath path, final Writer writer, final NormalizedNode inputStructure)
            throws IOException {

        final NormalizedNodeStreamWriter jsonStream = JSONNormalizedNodeStreamWriter.createExclusiveWriter(
                JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02.getShared(schemaContext), path,
                XMLNamespace.of(NS), JsonWriterFactory.createJsonWriter(writer, 2));
        try (NormalizedNodeWriter nodeWriter = NormalizedNodeWriter.forStreamWriter(jsonStream)) {
            nodeWriter.write(inputStructure);
        }
        return writer.toString();
    }
}